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University of Houston MICRO 3332 Microbio Quiz 1 1)The choices below each list three groups of organisms

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University of Houston

MICRO 3332

Microbio Quiz 1

1)The choices below each list three groups of organisms. For which choice, do all three groups have members that are considered microbes and are not a functional part of a multicellular organism?

a.            Protozoans, fungi, bacteria

b.            Animals, archaea, plants

c.             Protozoans, bacteria, animals

d.            Viruses, algae, archaea

e.            2 of the above are correct

2.            Which of the following scenarios represents a situation where a suspected disease—causing microbe would not be consistent with one or more of Koch’s postulates?

a.            The microbe is found in all patients with a particular disease

b.            Some healthy individuals possess the microbe

c.             The microbe can be isolated and grown in pure culture

d.            Injection of the microbe into an animal host does not produce disease symptoms

e.            2 of the above

3.            Pick false statement

a.            Susceptibility to penicillin or penicillin-like antibiotics relies on target bacteria possessing a cell wall and that they are actively growing

b.            The periplasmic space contains the peptidoglycan layer of gram- negative bacteria

c.             Capsules and slime layers are identical in form, structure, and composition except that one is typically found in pathogens, while the other is found in non-pathogens

d.            Generally, the passive diffusion of small, uncharged molecules across a membrane occurs without the aid of membrane transport protein

4.            Which of the following is true of viruses?

a.            They are prokaryotes

b.            They are eukaryotes

c.             They are not considered cells d. They have very large genomes

5.            An attenuated strain of a pathogenic bacteria or virus provided to a person…

a.            Causes the full effects of the disease in the individual

b.            May prevent disease in the individual by later exposure to a more virulent form of the strain

c.             Does not cause an immune reaction in the individual d. All of the above

6.            Pasteur’s work with the French wine industry proved all of the following, EXCEPT:

a.            That microbes are responsible for the chemical processes that produce wine

b.            Microbial growth and metabolism can occur in the absence of air

 

c.             The formation of acetic acid during wine production was due to the presence of contaminating microbes

d.            That microbes can cause disease

e.            2 of the above

7.            Which of the following statements is true?

a.            The cell envelope material of gram-positive bacteria contains endotoxin activity

b.            Gram-positive bacteria would likely be more susceptible to high osmotic pressure than gram-negative bacteria

c.             Mycoplasma species of bacteria would be very susceptible to the effects of penicillin or vancomycin

d.            The structure/composition of the membrane lipids and the cell wall of Archaea are the same as in bacteria

e.            All the above are false statements, none are true

8.            The (a) rapid growth rate of bacteria and (b) their ability to quickly evolve/adapt to their environment are both related to all of the following except

a.            Their lack of a nuclear membrane and a genome consisting of a single circular chromosome

b.            They possess a higher mutation rate than eukaryotes

c.             Their ability to acquire genes from different species and sources d. They divide asexually by binary fission

e. There are no exceptions, all are valid reasons

9.            Which of the following statement/statements among A-E regarding microbes is/are false?

a.            Unculturable microbes have been revealed through metagenomics studies

b.            Archaea is a type of eukaryotic unicellular microorganism that can live in extreme conditions

c.             The evolution of cyanobacteria allowed for the later evolution of cells with an aerobic metabolism

d.            Certain prokaryotes are autotrophs that can obtain energy from inorganic sources like iron (Fe2+), ammonium ions (NH4+), and hydrogen (H2)

e.            Though changes were made later, the Kingdom Protista was originally formed to contain all microorganisms

f.             2 of the statements among A-E are false

 

10.          A cross-section of the boundary layer(s) covering each of three bacterial cell types (A, B, C) is shown. Which of the following features listed in A-E below is no correctly matched with the proper cell type or cell types?

 

a.            O antigen found here: B

b.            Teichoic acids found here: A

c.             Murein (or Braun’s) lipoprotein found here: B d. Phospholipids found here: A, B, and C

e.            Tetrapeptide crossbridges found here: A and B

f.             A-E are all correctly matched